LOS ANGELES — An enduring image from the new movie “Weapons” comes early: The sight of elementary school students running out of their homes and onto the suburban grass, moving like flying birds with their arms out, to a song by George Harrison.

Except this is happening at night — at 2:17 a.m., to be precise — and there's no glee from the kids. Just running. And the Harrison song being played isn't the cheerful “Here Comes the Sun.” It's “Beware the Darkness.” Welcome back to another outing by director-writer Zach Cregger, a modern thriller master.

“Weapons” is his sophomore effort and it's more ambitious than his first, “Barbarian.” It's told in chapters from the perspective of various interweaving characters — like a horror version of Paul Thomas Anderson’s “Magnolia” —

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